page {
  height: 100%;
}

.container {
  background: #f9f9f9;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.header {
  background-color: #F8FCFF;
  text-align: center;
  position: relative;
  height: 12vw;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: center;
  padding: 0 4vw;
}

.header .h1 {
  font-size: 17px;
  letter-spacing: .2vw;
  font-weight: 600;
}

.catalog {
  flex: 1;
  width: 100%;
  background: #fff;
  display: flex;
  border-top: 1px solid #fafafa;
}

.catalog .nav {
  width: 162px;
  height: 100%;
}

.catalog .nav .item {
  text-align: center;
  line-height: 90px;
  width: 162px;
  height: 90px;
  color: #333;
  font-size: 28px;
  border-left: 6px solid #fff;
}

.catalog .nav .item.active {
  color: #ab956d;
  font-size: 36px;
  border-left: 6px solid #ab956d;
}

.main {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.main .background {
  width: 100%;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.main .background .item{
  width: 45%;
  text-align: center;
}